Al-Kāfi - Volume 6 > Another Chapter on the above Topic
Hadith #2

أَبُو عَلِيٍّ الْأَشْعَرِيُّ عَنِ الْحَسَنِ بْنِ عَلِيٍّ الْكُوفِيِّ عَنِ الْعَبَّاسِ بْنِ عَامِرٍ عَنْ دَاوُدَ بْنِ الْحُصَيْنِ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ مَنْ شَرِبَ مُسْكِراً لَمْ تُقْبَلْ مِنْهُ صَلَاتُهُ أَرْبَعِينَ يَوْماً فَإِنْ مَاتَ فِي الْأَرْبَعِينَ مَاتَ مِيتَةً جَاهِلِيَّةً وَ إِنْ تَابَ تَابَ اللَّهُ عَلَيْهِ .

2. Abu Ali al-Ash‘ariy has narrated from al-Hassan ibn Ali al-Kufiy from al-‘Abbas ibn ‘Amir from Dawud ibn al-Husayn who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘If one drinks intoxicating liquor his Salat (prayer) is not accepted for forty days. If he dies within the forty days, he dies as one of the ignorant people (pagans) and if he repents (turns to), Allah also turns to him.’”